Tshegofatso Pule’s funeral service is under way in in Meadowlands, Soweto, on Thursday morning.
The 28-year-old was found hanging from a tree in Durban Deep, in Roodepoort.
Pule, who was eight months pregnant, had been stabbed three times in the chest.
The expectant mother from Soweto reportedly went to visit her boyfriend in Florida last week but never returned.
Her death has caused outrage, with many calling for justice.